Rough idleĪnother indication of bad spark plugs in Cadillac Escalade is rough idle. When you press the gas pedal in your Escalade, the vehicle may hesitate to accelerate and it will take longer to reach your desired speed. If the spark plugs are not generating sparks properly, the engine will lose power. In case of doubt, check the condition of the spark plugs and replace them if found defective. However, it can happen that there are no error codes.
If you see any error code from P0300 to P0312, it indicates that there are misfires in the engine.
To perform further diagnostics, you will need to connect OBD2 scanner to your vehicle. When one or more of the spark plugs start to fail or has failed in your Escalade, it will cause the engine to misfire and the check engine light may illuminate in the instrument cluster.
Symptoms Check engine light illuminates due to misfires
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